Weed Management Handbook

glyphosate (numerous product names)

Rate Consult labels

Time Apply 1 to 4 weeks before planting to allow time for chemical to move completely into the roots of actively growing weeds.

Ammonium nonanoate (Axxe)

Rate A 10 to 13% volume to volume (v/v) dilution (13 to 16 fl. oz per gal water) is recommended for most weed control situations and based on the results.

Time Apply to dry plant material, that will remain dry (no rain/no irrigation) for > 2 hr.

2,4-D (many products, UNISON HERBICIDE EPA# 5905-542)

Rate 0.95 lb to 3.8 lb ae/A (2 to 8 pints/A), depending on weed species and formulation.

Time Apply over-the-top as a broadcast treatment when trees are dormant using a low rate, or direct spot sprays toward actively growing weeds before budbreak or after budset during cool weather.

dimethenamid-P (TOWER HERBICIDE EPA# 7969-239)

Rate 21 to 32 oz/A

Time Apply before budbreak.

Remarks Established trees only. Useful for nutsedge and groundsel control. Spring application should be done when soil temperature is at 55°F or higher to avoid crop injury. Product must be watered into the soil with 0.25 to 0.5 inch water within 24 hr after treatment.

fluazifop (FUSILADE DX HERBICIDE EPA# 100-1070)

Rate 0.25 to 0.375 lb ai/A (16 to 24 fl oz/A)

Time Apply to actively growing grasses in early spring, following ample rain, as a directed spray with 0.25% nonionic surfactant.

ethephon (Florel MONTEREY FLOREL BRAND PISTILL EPA# 54705-8; VERVE EPA# 228-660)

Oregon and Idaho only

Rate 1 quart/A; 5 fl oz/A Verve

Time Apply within 4 hr of mixing, or activity will be reduced.

diquat (REGLONE DESICCANT EPA# 100-1061, SLN# ID-100006)

Idaho-collard, dill, endive, garden beet, kohlrabi, leek, lettuce, mustard, onion, parsnip, radish, turnip, sugar beet, and Swiss chard seed
Oregon-cabbage, coriander, kohlrabi, onion, radish, rutabaga, spinach, sugar beet, Swiss chard, table beet, and turnip seed

Rate 0.375 to 0.5 lb ai/A (1.5 to 2 pints/A Reglone)

clopyralid (STINGER HERBICIDE EPA# 62719-73, SLN# WA-230002, SLN#230014)

Oregon and Washington only

Rate 0.094 to 0.125 lb ae/A (0.25 to 0.33 pints/A Stinger) Per label: Rate 0.094 to 0.125 lb ae/A (0.25 to 0.33 pint/A) in Washington; maximum rate in Oregon is 0.188 lb ae/A (0.5 pints/A)

Time Apply in 10 gal or more total spray volume when seed crop has at least two true leaves.

asulam (ASULOX HERBICIDE EPA# 70506-139, SLN#WA-080001, SLN#OR-070016; Asulam EPA# 34704-904, SLN# WA- 110003, SLN# OR-100008)

Oregon and Washington only

Rate 0.62 to 1.25 lb ai/A (1.5 to 3 pints/A Asulox)